67-72 should be a near bolt in... there are a couple of welds in the back that have to be cut on both trucks. All the cross bracing comes out of the 60-66 because it is all welded to the floor.
73-87 have the same frame (32" on Center from late 50's to 87) and could work but there is one issue. Because of the gas filler necks in the bed on a 73-87 chevy truck the floor has a raised on one or both sides. the 67-72 is more of a drop in... and the floors on 67-72 are BOLTED in were 67-73 are Welded In.
to do a wood bed is $500-600, you can get a used metal floor for $100-200. If you want to splurge a brand new metal floor is $1200 from LMC. Pretty Pricy but may be worth it for the last floor your ever put in your truck.
I found a 72 chevy truck bed for $100 on Craigslist that was the perfect candidate. The bed was beat up, banged up and rusted... except for the floor...
